
/* Declarations for getopt. 
   Copyright (C) 1989, 1990, 1991, 1992, 1993 Free Software Foundation, Inc. 
 
   This program is free software; you can redistribute it and/or modify it 
   under the terms of the GNU General Public License as published by the 
   Free Software Foundation; either version 2, or (at your option) any 
   later version. 
 
   This program is distributed in the hope that it will be useful, 
   but WITHOUT ANY WARRANTY; without even the implied warranty of 
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
   GNU General Public License for more details. 
 
   You should have received a copy of the GNU General Public License 
   along with this program; if not, write to the Free Software 
   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */ 
 
#ifndef _GETOPT_H 
#define _GETOPT_H 1 
 
#ifdef	__cplusplus 
extern "C" { 
#endif 

#ifndef PROTO
#define PROTO
#endif

/* For communication from `getopt' to the caller. 
   When `getopt' finds an option that takes an argument, 
   the argument value is returned here. 
   Also, when `ordering' is RETURN_IN_ORDER, 
   each non-option ARGV-element is returned here.  */ 
 
extern char *optarg; 
 
/* Index in ARGV of the next element to be scanned. 
   This is used for communication to and from the caller 
   and for communication between successive calls to `getopt'. 
 
   On entry to `getopt', zero means this is the first call; initialize. 
 
   When `getopt' returns EOF, this is the index of the first of the 
   non-option elements that the caller should itself scan. 
 
   Otherwise, `optind' communicates from one call to the next 
   how much of ARGV has been scanned so far.  */ 
 
extern int optind; 
 
/* Callers store zero here to inhibit the error message `getopt' prints 
   for unrecognized options.  */ 
 
extern int opterr; 
 
/* Set to an option character which was unrecognized.  */ 
 
extern int optopt; 
 
/* Describe the long-named options requested by the application. 
   The LONG_OPTIONS argument to getopt_long or getopt_long_only is a vector 
   of `struct option' terminated by an element containing a name which is 
   zero. 
 
   The field `has_arg' is: 
   no_argument		(or 0) if the option does not take an argument, 
   required_argument	(or 1) if the option requires an argument, 
   optional_argument 	(or 2) if the option takes an optional argument. 
 
   If the field `flag' is not NULL, it points to a variable that is set 
   to the value given in the field `val' when the option is found, but 
   left unchanged if the option is not found. 
 
   To have a long-named option do something other than set an `int' to 
   a compiled-in constant, such as set a value from `optarg', set the 
   option's `flag' field to zero and its `val' field to a nonzero 
   value (the equivalent single-letter option character, if there is 
   one).  For long options that have a zero `flag' field, `getopt' 
   returns the contents of the `val' field.  */ 
 
struct option 
{ 
#if	__STDC__ 
  const char *name; 
#else 
  char *name; 
#endif 
  /* has_arg can't be an enum because some compilers complain about 
     type mismatches in all the code that assumes it is an int.  */ 
  int has_arg; 
  int *flag; 
  int val; 
}; 
 
/* Names for the values of the `has_arg' field of `struct option'.  */ 
 
#define	no_argument		0 
#define required_argument	1 
#define optional_argument	2 
 
#if __STDC__ || defined(PROTO) 
extern int getopt (int argc, char *const *argv, const char *shortopts);  
extern int getopt_long (int argc, char *const *argv, const char *shortopts, 
		        const struct option *longopts, int *longind); 
extern int getopt_long_only (int argc, char *const *argv, 
			     const char *shortopts, 
		             const struct option *longopts, int *longind); 
 
/* Internal only.  Users should not call this directly.  */ 
extern int _getopt_internal (int argc, char *const *argv, 
			     const char *shortopts, 
		             const struct option *longopts, int *longind, 
			     int long_only); 
#else /* not __STDC__ */ 
extern int getopt (); 
extern int getopt_long (); 
extern int getopt_long_only (); 
 
extern int _getopt_internal (); 
#endif /* not __STDC__ */ 
 
#ifdef	__cplusplus 
} 
#endif 
 
#endif /* _GETOPT_H */ 

